Page 149 - 2017-Swift-Group-Motorhomes-Handbook-web
P. 149
ALDE BOILER
FITTED EQUIPMENT Draining Freshwater Heat Transfer Fluid
1. Switch off the water pump.
The central heating system is filled with heat
2. Open all water taps, showers, etc. transfer fluid (HTF), a solution of 50% ethylene
glycol antifreeze and 50% water.
3. Open the safety/drain valve by lifting the
yellow tab (Fig 1 [M]), or by turning the blue The antifreeze manufacturer will have a
knob (Fig 1 [K]) 90°. maximum water hardness recommendation.
Read the product label or contact the product
4. The system will drain directly below the manufacturer for details.
vehicle through the clear plastic hose on the
safety/drain valve. Check that all water has Note: For re-filling Alde recommends
emptied out (7–10 litres). Leave the valve in the antifreeze meeting VAG G12++ or G13
open position until the next time the hot water specification, and deionised water (0 ppm).
cylinder is used.
50:50 ethylene glycol antifreeze and water
Note: Check that the red breather valve (Fig will protect against frost down to -35–37 °C.
1[N]) is allowing air to enter the hot water A refractometer and/or hydrometer can be
cylinder, when it is being drained, and that used to measure the strength of the antifreeze
the clear plastic hose is not obstructed. solution.
Figure 1 Corrosion protection will vary depending on
the lifespan of the antifreeze. Read the product
Open the manual safety/drain valve label or contact the product manufacturer for
details.
! WARNING: Always replace the HTF in
accordance with the antifreeze product’s
lifespan. If in any doubt, replace the HTF
after 2 years.
Opening the safety/drain valve The corrosion inhibitors found in ethylene
glycol antifreeze may not be cross-compatible.
When topping up or replacing the HTF, ensure
the new antifreeze is compatible with the
current antifreeze product. Read the product
label or contact the product manufacturer for
details.
! WARNING: As a rough guideline,
blue and red antifreeze products are not
compatible with each other, but VAG G12++
and G13 spec antifreeze (purple/magenta) is
compatible with both.
Failure to fill with suitable HTF may result in
severe damage to your Alde system, and is
not covered under warranty.
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